"ExecutionError": "Smart contract panicked: assertion failed: Shares to sell must be greater than 0\n at assert (build/main_contract.js:2229)\n at sell_shares (build/main_contract.js:3469)\n at apply (native)\n at <anonymous> (build/main_contract.js:3145)\n at sell_shares (build/main_contract.js:3689)\n"